G07 13" FBO Image Size and Curl Issue

toro1966

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OK - I have a frustrating issue with a 13" G07 FBO monitor.
I have a Pacman cabaret with a 13" FBO. I rebuilt the chassis when I first got it (fly, cap kit from Bob, width coil, HOT) because it had curling in the lower right hand corner of the monitor was curling/waving. After I rebuilt, it still had the curl issue, and now the image would not fill the entire screen. There was about 1 1/2 –2" on the top and bottom. Again, this was not an issue before I rebuilt it. I also changed out the pin caps again (517/518) with Nichikons to see if they were just bad in the kit for some reason. Still had a slight curl on the right side. This was not an H-freq issue. All game maze lines were as straight as can be.

Instead of capping it again, I got a second chassis from a KLOVer. It was working great and filled the entire screen, just as it was supposed to. Only issue with it was that it had pretty bad curl in the bottom right again – worse than the first chassis. So my guess is this is a common issue with these but I don'y know, I am certainly 2 for 2 with curl. I just got done recapping and putting a new flyback in this chassis. Now I get the same symptoms as the first, it won't fill the entire screen. I get a 1 1/2 to 2" gap on top and bottom. Since this did not do this before I capped, it, I have to assume there is an issue with the kit. I got both kits from Bob, installed them exactly according to the instructions and have had this issue twice now. It is possible it is operator error, but unlikely, I am pretty comfortable with cap kits - and both chassis work and give me a good image otherwise.

There is no curl mod for the FBO and Bob doesn't include the xtra cap for it. I have also adjusted the width coil as much as can be and still didn't fix it. Any thoughts would be appreciated. Thanks!
 
Check the resistors in the corner. R317 and the like? They're supposed to be 490 Ohms, but often there will be the wrong value there.

Do a search, the exact part numbers should come up.
 
Issue was flyback...Flybacks were both new G07 flybacks, but the 13" is different and no one stocks the 13". Most of the time they are compatible, but apparently not in this case. Swapped the old one back and screen is normal size. Still have some curl, but working on that now...
 
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